Which type of database provides statistical information such as counts and averages?

• A. A relational database
• B. An operational database
• C. A statistical database
• D. A transactional database

Answer: (C)

A statistical database is specifically designed to store and manage statistical data, which includes information such as counts, averages, and other statistical computations. This type of database is often used in research and analysis contexts, where users require insights derived from aggregated data. Statistical databases allow for efficient data retrieval and analysis, making it easier to perform statistical operations without compromising the integrity of the data.

Relational databases, while they can store data and facilitate complex queries, are primarily focused on the relationships between different data entities and are not inherently designed to provide statistical information. Operational databases are intended to support day-to-day operations of an organization, emphasizing transaction processing over analysis. Transactional databases are similar in that they manage transactions; however, they do not primarily focus on statistical data aggregation or analysis.

Therefore, the unique design and purpose of a statistical database make it the appropriate choice for obtaining statistical information such as counts and averages.